initial energy monitoring implementation

src/espmega_iot_emon.cpp

@@ -0,0 +1,39 @@
+#include "espmega_iot_emon.hpp"
+
+ESPMega_CT::ESPMega_CT(uint8_t analog_pin, float (*adc_to_watts)(uint16_t adc_value), uint32_t fram_address)
+{
+    this->analog_pin = analog_pin;
+    this->adc_to_watts = adc_to_watts;
+    this->fram_address = fram_address;
+}
+
+void ESPMega_CT::begin()
+{
+    this->last_conversion_timestamp = millis();
+    ESPMega_FRAM.read(fram_address, (uint8_t *)&this->energy, 16);
+    this->power = adc_to_watts(ESPMega_analogRead(this->analog_pin));
+}
+
+void ESPMega_CT::loop()
+{
+    this->energy += (millis() - this->last_conversion_timestamp) / 3600000 * this->power;
+    this->power = adc_to_watts(ESPMega_analogRead(this->analog_pin));
+    this->last_conversion_timestamp = millis();
+    ESPMega_FRAM.write(fram_address, (uint8_t *)&this->energy, 16);
+}
+
+void ESPMega_CT::reset_energy()
+{
+    this->energy = 0;
+    ESPMega_FRAM.write16(fram_address, 0);
+}
+
+long double ESPMega_CT::get_energy()
+{
+    return this->energy;
+}
+
+float ESPMega_CT::get_power()
+{
+    return this->power;
+}

src/espmega_iot_emon.hpp

@@ -0,0 +1,18 @@
+#pragma once
+#include <ESPMegaPRO.h>
+class ESPMega_CT {
+    public:
+        ESPMega_CT(uint8_t analog_pin,float(*adc_to_watts)(uint16_t adc_value), uint32_t fram_address);
+        void begin();
+        void loop();
+        float get_power();
+        long double get_energy();
+        void reset_energy();
+    private:
+        uint8_t analog_pin;
+        uint32_t fram_address;
+        unsigned long last_conversion_timestamp;
+        float power;
+        long double energy;
+        float (*adc_to_watts)(uint16_t adc_value);
+};